Merry Christmas from Novak and Vajda

Watch some of your favorite players - including Novak Djokovic (and Marian Vajda), Viktor Troicki, Jelena Jankovic, Ana Ivanovic, Nikolay Davydenko, Andy Murray, David Ferrer, Jo-Wilfried Tsonga, Gilles Simon, Nicolas Kiefer, Vera Zvonareva, Dinara Safina, Elena Dementieva and other - have fun as they perform a special rendition of the Twelve Days Of Christmas song.